Oca - harvesting question

First year growing Oca so advice gratefully accepted earlier in the year and again now!

I still have loads of leaves on my Oca - I presume a heavy frost will be the end of the leaves.
When can I start digging around - before leaves are gone or after?

Our winters can be quite mild and wet - especially November in these parts - so I'm reckoning my harvesting may be later than other parts of the country maybe?

Looking forward to the harvest - hoping I've done a good job!

The  tubers continue to form from some additional underground storage organs in the stems (or that's what it looks like)

It is worth leaving them as long as you can. Last year I dug most of mine up on New Year's Day as it was very mild and sunny   

I have furtled a few out this year already for salads, but am leaving them alone after that until after the end of the year

De nada 

Leaving well alone for the moment

I've got some volunteers as well 

I'm thinking of putting mine into a perminant area in a sunny part of the forest garden then any volunteers will be in the best place for the next year.

They don't seem to mind staying in the same place and as they are disease free (so far, anyway) a permanent planting area could work well.

I grew mine under tomato plants this year, with a second lot alongside beetroot.

Well its' thanks to you I've been able to try them Auntiemogs

I shall definitely leave them a while. Looking forward to them though